JPH10382A - Electrostatic mist removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the retention of fine particles of mist to improve mist removing effect with respect of an electrostatic mist removing device for removing mist generated in airports and expressway. SOLUTION: A metal net 2 is arranged in a zigzag, and discharge electrodes 1 are arranged in the central parts of the metal net in the recessed and projection shape so that fixed distances may be kept from the net on the side faces. The discharge electrode 1 is constituted by spreading fine wires of in the order of 1.0mm diameter at equally spaced intervals to electrically insulate it from the metal net 2. When high voltage is applied from a high voltage power source 3 to the discharge electrodes 1, corona discharge is generated toward the metal net 2 from the fin wire part. When fine particles of mist enter from a direction 10, the fine particles are electrified to attract them to the metal net 2 of opposite polarity by coulomb force and are turned into water droplets, which are collected. By the arrangement in a zigzag, the region of an electric field is enlarged to increase mist removing effect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic fog eliminator for eliminating dew generated at airports and highways.

[0002]

2. Description of the Related Art The generation of fog is a major safety problem for airports and highways, and countermeasures are being studied in various fields. The fog is roughly classified into a supercooled fog generated at a low temperature and a warm fog generated at a normal temperature.

[0003] Conventionally, as a method for fogging a supercooled mist, there is a method of spraying a liquid gas or the like to the supercooled mist to form ice crystal nuclei and collide with surrounding mist to form an ice-like shape and allow the mist to fall naturally.

[0004] In the case of warm fog, there are a thermal treatment in which warm air is sprayed on the warm fog and evaporation, and a concentration reduction treatment in which a large amount of air is blown out and diluted. I can not say.

On the other hand, as a specific example of a system for forcibly extinguishing fog, Japanese Utility Model Application Laid-Open No. 64-327, which has already been disclosed.
No. 47 “Electrostatic Fog Erasing Net” is shown in FIG. As shown in the figure, the electrostatic type fog elimination net is composed of a discharge electrode 22 having a thin line in the center at equal intervals and metal nets 21 provided on both sides of the discharge electrode 22.
A positive high voltage is applied to the discharge electrode 22 to generate corona discharge toward the metal net 21.

[0006] Therefore, the fine particles of the mist that have entered the electrostatic mist elimination net are positively charged by corona discharge and negatively charged by the Coulomb force.
It is attracted to 1, adsorbed, liquefied and collected as water droplets.

[0007]

However, in the case of the conventional electrostatic mist elimination net shown in FIG. 3, the distance between the discharge electrode 22 and the metal net 21 is as small as about 20 mm, and the wind speed is assumed to be 2-3.
When a m / sec wind blows, the time required for the fog particles to pass through the electric field (residence time) is from 0.02 seconds to 0.03 seconds.
Seconds are very short. Therefore, when the wind is relatively strong, there is a problem to be solved such as a decrease in the fog elimination effect.

[0008]

According to the present invention, a corona discharge is generated between a discharge electrode and opposing electrodes disposed on both sides of the discharge electrode, and mist particles passing between the electrodes are provided. In the electrostatic fogging apparatus that collects and fogs the same fog particles on the opposite electrode having the opposite polarity to the fog particles, a plurality of discharge electrodes are arranged in parallel, and on both sides of each discharge electrode. Wherein the electric field region is enlarged by disposing the discharge electrodes at the center of the counter electrode by arranging the counter electrodes in a multi-stage or continuous zigzag shape. An extinguishing device is provided.

In the present invention, as described above, the discharge electrode and the counter electrode, that is, the metal net is multi-staged, or the metal net is arranged in a zigzag manner and the discharge electrode is provided at the center thereof. ~ 3 m / sec, and even if the residence time in the first stage is insufficient and the mist particles cannot be charged sufficiently, the mist particles are charged again in the second and third stages. The fine particles are charged and collected on the metal net.

Also, when a metal net is arranged in a zigzag manner and a discharge electrode is provided at the center thereof, the residence time becomes longer because the electric field region in the direction in which the fog flows on the wind increases.
The same effect as the multistage type can be obtained.

[0011]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a configuration diagram of an electrostatic fog eliminator according to a first embodiment of the present invention. In FIG. 1, 1 is a discharge electrode, 2 is a metal net, and 3 is a high voltage power supply.

The discharge electrode 1 is a thin wire having a diameter of about 1.0 mm stretched at equal intervals, and is disposed at a constant interval from the metal net 2 so as to be electrically insulated. The metal net 2 surrounds the discharge electrode 1 and is arranged in multiple stages in a zigzag manner (three electrodes 1 are provided in this embodiment), and the electrode 1 is arranged at the center of the zigzag shape.

When a positive or negative high voltage is applied to the discharge electrode 1 from the high-voltage power supply 3, the discharge electrode 1
Corona discharge is generated from the thin wire portion toward the metal net 2 surrounding the thin wire portion.

In this state, when the fine particles of the fog enter the vicinity of the discharge electrode 1 from the flow direction 10 of the fog as shown in the drawing, the fine particles are charged positively or negatively. The charged mist particles are attracted to the metal net 2 having the opposite polarity by Coulomb force and collected as water droplets.

FIG. 2 is a configuration diagram of an electrostatic fog eliminator according to a second embodiment of the present invention. In the figure, 11 is a discharge electrode,
12 is a metal net, and 3 is a high voltage power supply. As in the first embodiment, the discharge electrode 1 is a thin wire having a diameter of about 1.0 mm stretched at equal intervals, is electrically insulated at a constant interval from the metal net 12, and is alternately arranged with the metal net 12. Have been.

In FIG. 2, the discharge electrode 11 and the metal net 1
Although 2 is installed in two stages, it can be installed in three stages, four stages, or as many as required, depending on the installation location and the state of fog generation. The principle of fog elimination is the same as in the first embodiment, and a description thereof will be omitted.

In the first and second embodiments described above, the metal nets 2 are arranged in a zigzag pattern, and the discharge electrode 1 is provided at the center of the metal nets 2. , The residence time becomes longer, and almost all of the mist particles are charged and collected on the metal net 2.
In addition, by forming the discharge electrode 11 and the metal net 12 in a multi-stage system, the wind speed was temporarily increased to 2 to 3 m / sec, the residence time in the first stage was insufficient, and the fine particles could not be sufficiently charged. However, since the second stage and the third stage are charged again, almost all of the mist fine particles are charged and collected by the metal net.

[0018]

As specifically described above, the present invention provides an electrostatic fog eliminator in which the discharge electrode and the metal net are arranged in multiple stages or the metal net is installed in a zigzag shape. By expanding the area and lengthening the residence time of the fine particles of fog, there is an effect of increasing the charge amount of the particles and increasing the Coulomb force. Along with this, the fogging effect is also improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an electrostatic fog eliminator according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an electrostatic fog eliminator according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional electrostatic fog eliminator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Discharge electrode 2 Metal net 3 High voltage power supply 10 Fog flow direction

Continuation of the front page (72) Inventor Koichi Minamiyama 2-8-19 Shinhama, Arai-machi, Takasago-shi, Hyogo Takahashi Engineering Co., Ltd.

Claims (1)

[Claims] A corona discharge is generated between a discharge electrode and opposing electrodes disposed on both sides of the discharge electrode to charge mist particles passing between the electrodes. In an electrostatic atomizer that collects and atomizes particles, a plurality of discharge electrodes are arranged in parallel, and on both sides of each discharge electrode, the counter electrode is arranged in either a multistage or continuous zigzag shape. And an electric field region is enlarged by disposing each discharge electrode at the center of the counter electrode.